- Correspondence to Dr Helen A Brough, Children's Allergy Service, Guy's and St Thomas’ NHS Foundation Trust, 2nd Floor, Stairwell B, South Wing, Westminster Bridge Road, London SE1 7EH, UK;
- Received February 28, 2014
- Revised July 17, 2014
- Accepted July 28, 2014
- First published August 21, 2014.
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